ABSTRACT
This chapter discusses the feasibility of a separate pretreatment of the spent pregnant mare’s urine (PMU) on site to achieve ammonification and some organics removal by anaerobic means thus facilitating nitrification in the municipal wastewater treatment plant by lowering the presently high organic loadings. The wastewater from the plant is discharged into the city main sewer and along with the domestic sewage from the city is treated in a combination of an extended aeration activated sludge plant and a lagoon system. The specific objectives were to examine the minimum dilution required to achieve ammonification, the extent of Chemical oxygen demand removal in an anaerobic process, and the possibility of inhibition and/or toxicity due to total dissolved solids and/or free ammonia. The wastewater was from an estrone manufacturing plant and contained significant quantity of spent PMU. Gas composition in batch experiments was analyzed once every 2 days initially and whenever gas production was noticed at later stages of the study.
